Campo Santo did a couple of presentations at GDC 2016 last month, and the one I gave, “Making the World of Firewatch,” has been released as free content by GDC! It is an hour-long postmortem style talk about technical challenges in world art creation. The takeaways of the talk are mainly aimed at game developers with an intermediate level of experience, but if you are at all interested in world art, level design or general art production challenges you should still find the talk interesting.
A more general art talk was presented in GDC 2015—here’s the link to that one as well: The Art of Firewatch.
If you haven’t played Firewatch, you absolutely should.